OFFSET
1,2
COMMENTS
See A197737 for a guide to related sequences. The Mathematica program includes a graph.
EXAMPLE
Least x: -1.5399952272668390818059885802040...
Greatest x: 0.6975345552284129937951740662521298...
MATHEMATICA
a = 2; b = 3; c = 4;
f[x_] := a*x^2 + b*x; g[x_] := c*Cos[x]
Plot[{f[x], g[x]}, {x, -2, 1}]
r1 = x /. FindRoot[f[x] == g[x], {x, -1.54, -1.539}, WorkingPrecision -> 110]
RealDigits[r1] (* A198134 *)
r2 = x /. FindRoot[f[x] == g[x], {x, .79, .70}, WorkingPrecision -> 110]
RealDigits[r2] (* A198135 *)
PROG
(PARI) solve(x=-2, -1, 2*x^2+3*x-4*cos(x)) \\ Charles R Greathouse IV, Apr 15 2026
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Oct 22 2011
STATUS
approved
